Life saving operation for Bandit

Bandit started having Blood tinged urine a week or so ago we couldn't get an appointment with the vets as they were only dealing with emergencies, and at that point he was ok in himself, as of yesterday the 28th Bandit has been unable to pass any urine at all and is showing signs of distress we took him emergency vets early hours of this morning where he was given morphine muscle relaxents and antibiotics they said if he dont pass urine today he will need to go under and be catheterd for a urethra blockage which is life threatning if not treated urgently this procedure costs £500 money we just don't have, Bandits 5 years old we rescued him from an abusive home when he was 10 months, he loves the children and we equally love him so much, any little that can help is so much appreciated